Unprecedented isospecific 3,4-polymerization of isoprene by cationic rare earth metal alkyl species resulting from a binuclear precursor

被引：211

作者：

Zhang, LX ^{[1
]}

Luo, Y ^{[1
]}

Hou, Z ^{[1
]}

机构：

[1] RIKEN, Inst Phys & Chem Res, Organomet Chem Lab, Wako, Saitama 3510198, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2005年 / 127卷 / 42期

关键词：

D O I：

10.1021/ja055397r

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The isospecific 3,4-polymerization of isoprene has been achieved for the first time by use of a combination of a binuclear rare earth metal dialkyl complex, such as [Me2Si(C5Me4)(μ-PCy)YCH2SiMe3]2 (Cy = cyclohexyl), and an equimolar amount of [Ph3C][B(C6F5)4] as a catalyst system. A DFT calculation suggested that a binuclear monocationic monoalkyl species, such as [Me2Si(C5Me4)(μ-PCy)Y(μ-CH2SiMe3)Y(μ-PCy)(C5Me4)SiMe2]+, in which the alkyl group bridges the two metal centers, could be the true catalyst species. Copyright © 2005 American Chemical Society.

引用

页码：14562 / 14563

页数：2

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